Heat Pumps for Heating and Cooling

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Heat Pumps for Heating and Cooling ( heat-pumps-heating-and-cooling )

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Heat Pumps for Heating and Cooling efficiency and will cut the cost of pumping water by 60 percent, compared to a PSC motor. The ECM motor also makes the pump variable speed, which means your water pressure will be constant. The downside to the constant pressure/ECM pump is the initial cost. Depending on the model, the pump may cost $1200.00 to $1800.00. 4.4.2. Installation All wells should have the same grouting and casing requirements as for a public or private water supply wells. All activities around the storage and installation of grouting and backfilling should seek to ensure that no chemical and microbial contamination is introduced into the well. If clay or hardpan is encountered above a water-bearing formation, the permanent casing and grout should extend through the clay and/or hardpan. 4.4.3. Site requirements Water in sufficient quantity and quality must be readily available. A hydrogeological analysis of the site and chemical analysis of the water will provide an indication of the suitability of the proposed water source for use as a heat source and sink. As the water take is generally non-consumptive (i.e. will not result in any reduction in water volume at the source), the water body does not need to be large; however, it does need to be able to sustain minor temperature variations and provide enough heat energy to support heat pump function. The location of the water (i.e. distance from the heat pump) and the quality of the water will influence WSHP system design. For example, a deep aquifer or surface water body located a long way from the heat pump unit will require greater pipe length and larger pumps to overcome the greater resistance. Efficiency losses caused by larger pump requirements should be considered. 4.4.4. Piping materials All piping should be suitable for use in groundwater (i.e. non-toxic), corrosion proof and meet the same requirements as for public or private water supply wells. When installed in surface water, pipeline material should also be able to withstand bed erosion and flood events. 56

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